Treatment of contact lenses with an aqueous solution including sulfobetaine compounds
The present invention provides methods for treating contact lenses and compositions for the same. The present invention includes contacting a lens with an aqueous solution comprising a sulfobetaine compound represented by the formula: ##STR1## wherein: R.sub.1 is an alkyl group having from 8 to 30 carbon atoms, R.sub.2 and R.sub.3 are individually hydrogen or alkyl groups having from 1 to 4 carbon atoms, and R.sub.4 is an alkyl group having from 2 to 6 carbon atoms. In preferred embodiments of the invention, the subject compounds are used in combination with antimicrobial agents for providing simultaneous disinfection and cleaning of contact lenses.
Claims
1. A method for treating contact lenses comprising contacting a lens with an aqueous solution comprising
- (a) at least about 0.01 percent by weight of a sulfobetaine compound represented by the formula: ##STR5## wherein: R.sub.1 is an alkyl group having from 8 to 30 carbon atoms, R.sub.2 and R.sub.3 are individually hydrogen or an alkyl group having 1 to 4 carbon atoms, and R.sub.4 is an alkyl group having from 2 to 6 carbon atoms.
2. The method of claim 1 wherein R.sub.1 is an aliphatic alkyl group having from 8 to 22 carbon atoms.
3. The method of claim 1 wherein R.sub.1 is an aliphatic alkyl group having 10 carbon atoms.
4. The method of claim 1 wherein R.sub.2 and R.sub.3 are both methyl groups.
5. The method of claim 1 wherein R.sub.4 is an aliphatic alkyl group having 3 carbon atoms.
6. The method of claim 1 wherein the sulfobetaine compound comprises N-decyl-N,N-dimethyl-3-ammonio-1-propane-sulfonate.
7. The method of claim 1 wherein the solution further comprises an antimicrobial agent.
8. The method of claim 1 wherein the solution includes polyaminopropyl biguanide.
9. The method of claim 1 comprising the sequential steps of: rubbing the lens with the solution, followed by immersing the lens within the solution.
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Type: Grant
Filed: Jan 30, 1997
Date of Patent: Jun 16, 1998
Inventors: David J. Heiler (Avon, NY), Suzanne F. Groemminger (Rochester, NY)
Primary Examiner: Jeffrey Snay
Attorney: Chris P. Konkol
Application Number: 8/795,048
International Classification: A61L 200;
